3876A.pdf

Technical Note 3876A

Sub-section concerned: 13B

Vehicle

Type

Engine

Basic manuals

Kangoo

XCXX

K9K, F9Q

MR 381

Clio II

XBXX

K9K

Technical Note 3674A

Mégane II

XMXX

F9Q, K9K

MR 366

Technical Note 3673A -

Technical Note 3674A

Laguna II

XGXX

F9Q, G9T

Espace IV

JK0X

G9T, P9X

MR 363

Vel Satis

XJXX

G9T, P9X

MR 355

Modus

XPXX

K9K

MR 387

FAULT FINDING

GENERIC OBD DIESEL

General operation of the toxic fume filter system on diesel engines (OBD)

for all vehicles produced from 1 st January 2003.

77 11 332 622

Edition 2 - NOVEMBER 2004

EDITION ANGLAISE

"The repair procedures given by the Manufacturer in this document are based on the

technical specifications current when it was prepared.

All copyrights reserved by RENAULT.

Copying or translating, in part or in full, of this document or use of the service part

reference numbering system is prohibited without the prior written authority of

RENAULT.

The procedures may be modified as a result of changes introduced by the

manufacturer in the production of the various component units and accessories from

which their vehicles are constructed."

113B

DIESEL INJECTION SYSTEM

OBD Diesel - Contents

DIESEL INJECTION SYSTEM

OBD Diesel - Contents

13B

INTRODUCTION

OBD SYSTEM

1. PRINCIPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2. DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Warm up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3. OBD WARNING LIGHT OPERATING PRINCIPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Disappearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

COMPONENTS MONITORED BY OBD SYSTEM

1. FUEL CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. AIR CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3. EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4. OTHER COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

FAULT FINDING AND REPAIR PROCEDURES

1. USUAL PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2. OBD IN THE FAULT FINDING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3. DIAGNOSTIC TOOL: CLIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

PRECAUTIONS AND PROCEDURES TO FOLLOW AFTER REPAIR

1. RESETTING THE OBD SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2. PROCEDURES TO FOLLOW AFTER REPLACING THE COMPONENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

– Replacing the particle filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

– Replacing the EGR valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

– Replacing the air swirl flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

–Replacing at least 2 injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

13B-1

DIESEL INJECTION SYSTEM

OBD Diesel - Introduction

13B

OBD Diesel - Introduction

On the 13th October 1998, the European Union adopted a measure to introduce a European diagnostic system

(EOBD: European On Board Diagnostic) in European Union Member states (some non-European countries have

adopted this EOBD system too, Mexico, for example).

This regulation has been in force for petrol engine models since 1 st January 2000.

Since the 1 st January 2004, all diesel vehicles registered for the first time, must be fitted with the EOBD

system.

The system generally has:

–a standardised toxic fume filter system warning light (OBD "orange" warning light),

–a standardised diagnostic interface (the diagnostic socket currently used for fault finding on RENAULT

vehicles),

–a protocol for standardised data.

The OBD warning light indicates faults that relate to toxic emissions diagnosed by the EOBD. When this warning

light comes on, the vehicle's owner must visit the workshop as soon as possible. An odometer records the mileage

covered with the OBD light lit.

The term "ScanTool" refers to diagnostic tools that can support OBD fault checks.

The codes found by the tools are in accordance with the international OBD standards, and cover all the vehicle

components that influence system pollution. With this tool, you can read the OBD fault codes for all vehicle

marques.

In some European countries, the OBD system can be used in technical checks to test the level of pollution of each

vehicle (this is already the case for petrol vehicles). The ScanTool is made by numerous manufacturers and there is

no law in place ruling the use of one specific brand supplier.

In the RENAULT network, CLIP is the designated diagnostic tool and should be used for all vehicle marques.

13B-2

DIESEL INJECTION SYSTEM

OBD Diesel - System operation

13B

OBD Diesel - System operation

1. Principle

The OBD system enables:

– The OBD system to be active throughout the service life of the vehicle. The driver is warned that an operational

fault has occurred that has led to the pollution threshold being exceeded, (OBD warning light, see previous

page) or when a component fault is present.

– The computers can detect abnormalities that cause pollutant gas emissions (measured in standardised cycles)

above the OBD thresholds. They have specific diagnostic programming for component pollution control.

System operating principle:

– the electrical fault finding procedures are carried out continuously,

– the diagnostic for component pollution control is tested once when the vehicle is driven (see definition).

The engine must be operating under certain conditions in order for it to work:

●

coolant temperature conditions,

vehicle speed conditions,

delay after starting,

● engine parameters (inlet manifold vacuum, vehicle speed, gas flow, etc.).

IMPORTANT

On some vehicles, fault finding is carried out both during driving or when the vehicle is stationary.

Always refer to the MR for each vehicle type.

13B-3

DIESEL INJECTION SYSTEM

OBD Diesel - System operation

13B

2. Definitions

2.1 Driving

A drive is calculated based on the following three conditions being met:

– starting the engine,

– phase during which the selected fault finding procedure is run (this depends on the use),

– switching the ignition off.

2.2 Warm up

A warm-up (warming up the engine) is detected when the two following conditions are met:

–the coolant temperature has to have increased by 22 ° C compared to the coolant temperature when the engine

was started,

– the coolant temperature must have gone beyond the minimum threshold ( 70 ° C ).

An odometer records the mileage covered with the OBD light lit. It resets:

– if the fault memory is cleared after the fault has been eliminated,

– if the fault does not recur during the next 40 warm ups, the fault code will be cleared,

– if the lit OBD warning light goes off after 4 fault finding procedures without any faults being displayed, it is

reactivated by the appearance of a new fault,

– when a new fault appears when the light has been turned off beforehand.

If the fault does not recur during 40 warm ups, the following information is deleted from the computer's memory:

– its fault code,

– the "FAULT DISPLAY CONTEXT",

– the odometer.

13B-4

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